Reverberatory furnace.



No. 881,110. PATENTED MAR. 10, 1908.

- F. C0TT0N.

REVBRBBRATORY -PURNAGR APPLICATION FILED FEB. 3, 1906.

/V/ nVESSEJ /m/f/vof? FRANK COTTON, OF HORNSBY, NEW SOUTH WALES,AUSTRALIA.

REVERBERATORY FURNACE.

Application filed February 3, 1906.

Specification of Letters Patent.

Patented March 10, 1908.

Serial No. 299,252.

T o all whom it may concern:

Be it known that I, FRANK COTTON, a resident of Hornsby, in the State ofNew South Wales and the Commonwealth of Australia, have invented certainnew and useful Improvements in Reverberatory Furnaces, of which thefollowing is a full, clear, and exact description.

This invention relates to that class of fur* nace in which the fuel usedis in a gaseous form and its object is to provide a furnace capable ofbeing raised to and worked at a very high temperature but which will bemore economical than any furnace of that class now in use.

It consists mainly of a circular dome shaped furnace with a concavefloor slightly sloping towards a tapping hole on one side and having onthe other side a suitable hole for removing the slag. The ore or othermaterial to be fused is fed through a circular opening in the top of thedome. When it is desired to insert a crucible within the furnace asuitably constructed block is placed in the center of the concaved floorand upon this is placed the Crucible.

Tangential to the circumference of the furnace is a conduit into whichthe burner is introduced so that the flame issuing from the nozzle ofthe burner shall strike the sides of the furnace and acquire a circularmotion. On the same side of the furnace and parallel to the inletconduit is a second conduit con ducting the waste gases to the chimney,these two conduits are in the same plane and as close together aspracticable. The length of the inlet conduit should be approximately thesame as the diameter of the furnace. The inner lining of the furnaceconsists of fire brick or other suitable fire sustaining material aroundwhich is a thick filling of sand and outside of this is an ordinarybrick construction bound with iron plates or rods. But in order thatthis invention may be properly understood reference will now be made tothe accompanying sheet of drawings in which Figure 1 is a horizontalsection through the furnace. Fig. 2 is a cross section through thecenter of the same. Fig. 3 is a side elevation.

The liquid fuel or other burner is introduced at the entrance of theconduit a leading to the furnace b while the flue c conducts the wastegases to the chimney d. The iioor of the furnace b slopes slightly fromall sides towards a tap hole c opposite to which there is a hole f forthe removal of the slag, re-

cesses being provided in the outer walls of the furnace to facilitatethe operations of tappin the molten metal and removing the slag, whi e aloose brick g at the end of the channel c may be removed for the purposeof cleaning the furnace, flue and chimney. The roof of the furnace l) isprovided with a central circular opening h for the purpose ofreplenishing the furnace with ore or other material to be treated.

7c represents a space between the inner and outer walls to be filledwith sand packing. It will readily be seen that by introducing the flameof the burner at a tangent to the circumference of the circular furnacethe flame will strike the wall of this furnace and acquire a circularmotion as shown by the arrows in Fig. 1. This centrifugal motion causesthe heavier gases to hug the wall of the furuace while the lighter gaseswhich would otherwise escape unburned go to the center of the furnacewhere they are readily consumed by reason of the intense reflected heatfrom the dome.

What I claim and desire to secure by Letters Patent is 1. Areverberatory furnace comprising inner and outer walls separated by afilling of sand, a circular furnace chamber having a concaved floor anddomed roof, an intake conduit arranged tangentially to the circumferenceof said chamber, the len th of said intake conduit being approximate yequal to the diameter of the furnace and an outlet nconduit parallel toand in the same horizontal plane as said intake conduit but locatednontangentially with respect to the circumference of the furnacechamber.

2. A reverberatory furnace comprising inner and outer walls separated bya suitable filling of sand, a circular furnace chamber having a concavedfloor and domed roof, said roof being provided with a central feedaperture for the material to be treated, a fuel intake conduit for saidchamber located tangentially to its circumference, the length of as hisinvention, hev has signed his name in sid iclonduit beng equal1 totheddiameteruo presence of tWo subscribing Witnesses. t e rnace an anout et con uit ara e to and in the same horizontal plane gs said FRANKCOTTON' 5 intake conduit but out of tangential line with Witnesses:

respect to the circumference of said chamber. WALKER SIGMONT,

In testimony that he claims the vforegoing T. O. ALLEN.

